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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7802774 | Cooling tower air inlet and drain pan A mechanical draft cooling tower is provided. The cooling tower includes a direct cooling section having a plurality of fill sheets. Water is sprayed downwardly over the fill sheets and is collected in a collection sump. The collection sump includes two end walls, t... | 09/28/2010 |
| 7779898 | Heat transfer tube assembly with serpentine circuits A method and apparatus are provided for cooling fluids entering a closed circuit cooling tower. A triple circuit assembly is used to cool the fluid in the closed loop. The triple circuit assembly design allows a heat transfer tube bundle to maintain a relatively low... | 08/24/2010 |
| 7610770 | Cooling tower seal joint An assembly for connecting two vertically aligned cooling tower modules is provided. The assembly includes a lower module with a top structural edge and an upper module with a bottom structural edge. The top structural edge of the lower module includes an outer stru... | 11/03/2009 |
| 7310958 | Control of heat exchanger operation A method of controlling the operation of a heat exchanger with evaporative and non-evaporative sections. The method includes the following steps: providing desired values of temperature or pressure; comparing present values of temperature or pressure to the desired ... | 12/25/2007 |
| 7107782 | Evaporative heat exchanger and method The heat exchange apparatus and method is provided with an indirect evaporative heat exchange section and a direct evaporative heat exchange section. An evaporative liquid is sprayed downwardly into the direct evaporative section to directly exchange heat from the e... | 09/19/2006 |
| 7100634 | Liquid collection basin connection assembly An assembly for connecting two adjacent liquid collection basins is provided. The assembly includes a flume for connecting a first liquid collection basin to a second liquid collection basin. The flume comprises a generally rectangular structure having a top section... | 09/05/2006 |
| 6820685 | Densified heat transfer tube bundle A heat exchanger coil assembly is made up of arrays of substantially equally spaced apart serpentine circuits located in the coil assembly region of the conduit, with adjacent circuits being arranged in a parallel offset fashion in which adjacent return bends are ov... | 11/23/2004 |
| 6644566 | Water distribution conduit A distribution apparatus for a cooling tower has a source of liquid communicated to a plurality of branches extending from the source of liquid for transfer of a liquid to a cooling tower arrangement, where the branches are provided with a plurality of ge... | 11/11/2003 |
| 6574980 | Circuiting arrangement for a closed circuit cooling tower The final segment in one-half or one-third circuit tube assemblies are arranged in a concurrent manner with the air flow in a closed-circuit cooling tower to more fully utilize spray-water cooling that occurs in the region below the tube assembly but abov... | 06/10/2003 |
| 6564864 | Method of operating low profile heat exchange method with reduced water consumption A method of exchanging heat is disclosed. Process fluid is passed through a dry indirect contact heat exchange section while a main air stream is also passed through that section. The process fluid is passed through a second indirect contact heat exchange... | 05/20/2003 |
| 6415615 | Ice thermal storage control An arrangement of apparatus for the measurement of the quantity amount of ice in an ice thermal storage system having a storage tank with a storage fluid and a cooling coil assembly therein, and the method for measuring such ice quantity, which apparatus ... | 07/09/2002 |
| 6298676 | Ice thermal storage control An arrangement of apparatus for the measurement of the quantity amount of ice in an ice thermal storage system having a storage tank with a storage fluid and a cooling coil assembly therein, and the method for measuring such ice quantity, which apparatus ... | 10/09/2001 |
| 6260830 | Film fill-pack for inducement of spiraling gas flow in heat and mass transfer contact apparatus with self-spacing fill-sheets A film fill-pack has a plurality of fill-sheets with an ordered array of ridges and grooves generally extending above a planar surface on both the obverse and reverse surfaces of a fill-sheet, which fill-sheets at an assembled state provide the ridges and... | 07/17/2001 |
| 6247522 | Heat exchange members for thermal storage apparatus A thermal storage apparatus is disclosed. The apparatus uses a group of heat exchange members immersed in a phase change medium to store coolness by freezing the heat exchange medium. The heat exchange members each include tubular passageways to carry a h... | 06/19/2001 |
| 6237900 | Rigid evaporative heat exchangers A heat exchanger is disclosed. The heat exchanger has structural members made of fiber reinforced resin material. These structural members include vertical columns and walls. The walls are bonded to the columns to create rigid joints. The bonded joints ha... | 05/29/2001 |
| 6216486 | Ice storage coil arrangement The present invention provides a planned array tubes and circuits in a cooling coil for a thermal storage unit to maintain at least some of the vertical aisles between adjacent circuits or sets of circuits to provide communication through the coil to pres... | 04/17/2001 |
| 6213200 | Low profile heat exchange system and method with reduced water consumption A system and method of exchanging heat are disclosed. Three heat exchange sections are used: a dry indirect contact heat exchange section, a second indirect contact heat exchange section that is operable in either a wet or dry mode, and a direct contact h... | 04/10/2001 |
| 6206350 | Film fill-pack for inducement of spiraling gas flow in heat and mass transfer contact apparatus with self spacing fill-sheets A film fill-pack has a plurality of fill-sheets with an ordered array of ridges and grooves generally extending above a planar surface on both the obverse and reverse surfaces of a fill-sheet, which fill-sheets at an assembled state provide the ridges and... | 03/27/2001 |
| 6138746 | Cooling coil for a thermal storage tower A cooling coil arrangement for a cylindrical tower provides coverage of a larger area of the cylindrical footprint of a cooling tower to enable more economical usage of the vertical tower storage capacity for ice thermal storage, which coil arrangement ha... | 10/31/2000 |
| 5904864 | Robotic welding A robotic welding method for making a heat exchanger having tubes and inlet and outlet headers is disclosed. The headers have planar tubesheets and covers. The planar tubesheets are welded to the inlet and outlet ends of tubes. The tubesheets have two co-... | 05/18/1999 |
| 5902522 | Rigid cooling tower and method of constructing a cooling tower A cooling tower is disclosed that is resistant to lateral displacement while minimizing the number and type of parts, and while limiting the amount of horizontal bracing. The cooling tower has a fiber reinforced material skeletal frame. Moment-transferrin... | 05/11/1999 |
| 5851446 | Rigid cooling tower A cooling tower is disclosed that is resistant to lateral displacement while minimizing the number and type of parts, and while limiting the amount of horizontal bracing. The cooling tower has a fiber reinforced material skeletal frame. Moment-transferrin... | 12/22/1998 |
| 5816318 | Combination direct and indirect closed circuit evaporative heat exchanger A heat exchange apparatus is provided with an indirect evaporative heat exchange section and a direct evaporative heat exchange section. A uniform temperature evaporative liquid is downwardly sprayed into the indirect section to indirectly exchange sensib... | 10/06/1998 |
| 5724828 | Combination direct and indirect closed circuit evaporative heat exchanger with blow-through fan A heat exchange apparatus which can be used as an evaporative condenser, fluid cooler or wet-air cooler, is provided with a direct evaporative heat exchange section overlying an indirect evaporative heat exchange section. An air entry zone common to both ... | 03/10/1998 |
| 5596877 | Header and coil arrangement for cooling apparatus A cooling apparatus is provided comprising a vessel confining a pool of liquid. A plurality of separate tubular passageways are immersed in the liquid. A header assembly is provided having a first chamber and a second chamber. The first chamber is operati... | 01/28/1997 |
| 5480564 | Water treatment system The present invention comprises an improved method and apparatus for treating water in heat exchange systems. The present invention automatically and inexpensively provides an effective chemical to process water systems at times and in proportion to the n... | 01/02/1996 |
| 5435382 | Combination direct and indirect closed circuit evaporative heat exchanger A heat exchange apparatus is provided with an indirect evaporative heat exchange section and a direct evaporative heat exchange section. A uniform temperature evaporative liquid is downwardly sprayed into the indirect section to indirectly exchange sensib... | 07/25/1995 |
| 5431858 | Energy conserving fluid flow distribution system with internal strainer aNd method of use for promoting uniform water distribution A side feeding fluid distribution system is provided which is used for uniformly distributing a heat exchange fluid to an underlying structure. The distribution system comprises a distribution pan, a pre-distribution box, and a removable basket strainer h... | 07/11/1995 |
| 5405541 | Water treatment process The present invention comprises an improved method and apparatus for treating water in heat exchange systems. The present invention automatically and inexpensively provides an effective chemical to process water systems at times and in proportion to the n... | 04/11/1995 |
| 5390505 | Indirect contact chiller air-precooler method and apparatus An apparatus and method for cooling, air which apparatus includes an indirect evaporative cooler, an indirect contact chiller, a reheat coil component, an ice-thermal-storage component and an ice-manufacturing refrigeration chiller to provide alternative ... | 02/21/1995 |
| 5386709 | Subcooling and proportional control of subcooling of liquid refrigerant circuits with thermal storage or low temperature reservoirs The present invention provides method and apparatus for incorporating thermal storage and other low-temperature reservoirs with new or retrofittable refrigerant circuit devices to increase their thermal operating capacity and efficiency by subcooling refr... | 02/07/1995 |
| 5383339 | Supplemental cooling system for coupling to refrigerant-cooled apparatus A supplemental cooling system couplable to at least one refrigerant-cooled apparatus with a refrigerant circuit to reduce the refrigerant temperature in the refrigerant circuit, which cooling system is shown with a thermal storage system as well as an aux... | 01/24/1995 |
| 5328600 | Cooling tower strainer tank and screen A cooling system with at least one cooling tower and multiple upper pans or distribution manifold pipes is provided with a strainer tank assembly at the tower lower end in proximity to the sump to receive incoming fluid for cooling, which strainer tank in... | 07/12/1994 |
| 5273687 | Microbiological control of recirculating water in evaporative cooling systems at idle conditions The present invention provides apparatus and the method to treat process water of heat exchange systems with fluid flow through the system at an idling or inoperative system mode, which system may have a biocidal treatment arrangement coupled thereto.... | 12/28/1993 |
| 5234161 | Counterflow spray nozzle A large anti-vortexing nozzle is provided which may be used in a distribution system comprising multiple nozzles to uniformly distribute fluid to an underlying surface. The nozzle is non-clogging, operates at very low spray pressures, and evenly distribut... | 08/10/1993 |
| 5232636 | Cooling tower strainer tank and screen A cooling system with at least one cooling tower and multiple upper pans or distribution manifold pipes is provided with a strainer tank assembly at the tower lower end in proximity to the sump to receive incoming fluid for cooling, which strainer tank in... | 08/03/1993 |
| 5226681 | Outlet connection assembly The present invention provides an outlet connection for use in a lined basin. A structural steel basin, usually part of a cooling tower, includes a fiberglass reinforced polyester liner. Such liner is desired to provide corrosion resistance and watertight... | 07/13/1993 |
| 5038574 | Combined mechanical refrigeration and absorption refrigeration method and apparatus A method and apparatus combining absorption refrigeration and mechanical expansion refrigeration to chill an air conditioning medium wherein a mechanical refrigeration system is alternately (1) connected in series with an absorption refrigeration system d... | 08/13/1991 |
| 4966007 | Absorption refrigeration method and apparatus An absorption refrigeration method and apparatus having concentrator and evaporator phases operated at substantially equal pressure and wherein the concentrator phase utilizes a mechanically driven heat pump to concentrate absorbent solution and to conden... | 10/30/1990 |
| 4964279 | Cooling system with supplemental thermal storage The present invention provides a cooling system with supplemental thermal storage. The cooling system comprises a compressor, an evaporative condenser, a thermal storage unit, and an evaporator. During normal outdoor temperatures when building cooling is ... | 10/23/1990 |
